Thirty-two people from 11 states have been infected with “a strain of Shiga toxin-producing E. coli” thus far, leading to 13 hospitalizations, ABC News reports. Although no deaths have been reported, one of those hospitalized experienced kidney failure. Thus far, 18 people have been infected in Canada.

Outbreak Alert: Do not eat any romaine lettuce, including whole heads and hearts, chopped, organic and salad mixes with romaine until we learn more. If you don’t know if it’s romaine or can’t confirm the source, don’t eat it. https://t.co/NrFOIxG8hxpic.twitter.com/FuzkHv4bd3

Before it learns more about the source the outbreak, the CDC told consumers to throw out “whole heads of romaine, hearts of romaine, and bags and boxes of precut lettuce and salad mixes that contain romaine, including baby romaine, spring mix, and Caesar salad” — and then wash and sanitize whatever space in which the romaine was stored.